aboutsummaryrefslogtreecommitdiff
path: root/sim/iq2000/sim-if.c
blob: a2331a1e2fdf8af76678b9437b0991c8354870c5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
/* Main simulator entry points specific to the IQ2000.
   Copyright (C) 2000-2023 Free Software Foundation, Inc.
   Contributed by Cygnus Solutions.

This file is part of the GNU simulators.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* This must come before any other includes.  */
#include "defs.h"

#include "sim-main.h"

#include <stdlib.h>

#include "sim/callback.h"
#include "sim-options.h"
#include "libiberty.h"
#include "bfd.h"

static void free_state (SIM_DESC);

/* Cover function for sim_cgen_disassemble_insn.  */

static void
iq2000bf_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
			  const ARGBUF *abuf, IADDR pc, char *buf)
{
  sim_cgen_disassemble_insn(cpu, insn, abuf, pc, buf);
}

/* Cover function of sim_state_free to free the cpu buffers as well.  */

static void
free_state (SIM_DESC sd)
{
  if (STATE_MODULES (sd) != NULL)
    sim_module_uninstall (sd);
  sim_cpu_free_all (sd);
  sim_state_free (sd);
}

extern const SIM_MACH * const iq2000_sim_machs[];

/* Create an instance of the simulator.  */

SIM_DESC
sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
	  char * const *argv)
{
  char c;
  int i;
  SIM_DESC sd = sim_state_alloc (kind, callback);

  /* Set default options before parsing user options.  */
  STATE_MACHS (sd) = iq2000_sim_machs;
  STATE_MODEL_NAME (sd) = "iq2000";
  current_alignment = STRICT_ALIGNMENT;
  current_target_byte_order = BFD_ENDIAN_BIG;

  /* The cpu data is kept in a separately allocated chunk of memory.  */
  if (sim_cpu_alloc_all_extra (sd, 0, sizeof (struct iq2000_sim_cpu))
      != SIM_RC_OK)
    {
      free_state (sd);
      return 0;
    }

  if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
    {
      free_state (sd);
      return 0;
    }

  /* The parser will print an error message for us, so we silently return.  */
  if (sim_parse_args (sd, argv) != SIM_RC_OK)
    {
      free_state (sd);
      return 0;
    }

  /* Allocate core managed memory.  */
  sim_do_commandf (sd, "memory region 0x%x,0x%x", IQ2000_INSN_VALUE, IQ2000_INSN_MEM_SIZE); 
  sim_do_commandf (sd, "memory region 0x%x,0x%x", IQ2000_DATA_VALUE, IQ2000_DATA_MEM_SIZE); 

  /* check for/establish the reference program image */
  if (sim_analyze_program (sd, STATE_PROG_FILE (sd), abfd) != SIM_RC_OK)
    {
      free_state (sd);
      return 0;
    }

  /* Establish any remaining configuration options.  */
  if (sim_config (sd) != SIM_RC_OK)
    {
      free_state (sd);
      return 0;
    }

  if (sim_post_argv_init (sd) != SIM_RC_OK)
    {
      free_state (sd);
      return 0;
    }

  /* Open a copy of the cpu descriptor table.  */
  {
    CGEN_CPU_DESC cd = iq2000_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
					      CGEN_ENDIAN_BIG);

    for (i = 0; i < MAX_NR_PROCESSORS; ++i)
      {
	SIM_CPU *cpu = STATE_CPU (sd, i);
	CPU_CPU_DESC (cpu) = cd;
	CPU_DISASSEMBLER (cpu) = iq2000bf_disassemble_insn;
      }
    iq2000_cgen_init_dis (cd);
  }

  return sd;
}

SIM_RC
sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char * const *argv,
		     char * const *env)
{
  SIM_CPU *current_cpu = STATE_CPU (sd, 0);
  host_callback *cb = STATE_CALLBACK (sd);
  bfd_vma addr;

  if (abfd != NULL)
    addr = bfd_get_start_address (abfd);
  else
    addr = CPU2INSN(0);
  sim_pc_set (current_cpu, addr);

  /* Standalone mode (i.e. `run`) will take care of the argv for us in
     sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
     with `gdb`), we need to handle it because the user can change the
     argv on the fly via gdb's 'run'.  */
  if (STATE_PROG_ARGV (sd) != argv)
    {
      freeargv (STATE_PROG_ARGV (sd));
      STATE_PROG_ARGV (sd) = dupargv (argv);
    }

  if (STATE_PROG_ENVP (sd) != env)
    {
      freeargv (STATE_PROG_ENVP (sd));
      STATE_PROG_ENVP (sd) = dupargv (env);
    }

  cb->argv = STATE_PROG_ARGV (sd);
  cb->envp = STATE_PROG_ENVP (sd);

  return SIM_RC_OK;
}